Sensirion has developed new flow metering devices that are autoclavable and can be washed. The new SFM3200-AW and SFM3300-AW mass flow meters are ideal for applications involving expiratory and proximal ventilation. The CMOSens® technology used by Sensirion is extremely resistant to environmental influences, which makes CMOSens® flow sensors ideal for applications where sterilization is required. Sensirion's newly developed flow sensors have been comprehensively verified. The chip-based sensor component was tested for more than 1000 hours at 150°C.
Apart from this, test results are available which show that the sensor components have withstood 1000 temperature variation cycles involving switches from -40°C to 140°C. The results confirm the outstanding zero-point stability of the metering component and of the electronics that process the signals. Aging models have consequently suggested that the offset drift over a ten-year lifespan is smaller than 0.2 slm.